Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Look at Little Locos.  https://littlelocos.com/
They have a casting set for  the Parcell and Weed vertical hit and miss engine.
Philip DuClos also built a vertical gearless hit and miss engine. The plans are in the Two Shop Masters book.
Here is a video of my Parcell and Weed engine.   
 Scott